     html,
     body {
         margin: 0;
         font-family: "Microsoft YaHei", sans-serif;
         background: #fafafa;
         color: #333;
     }

     .wrap {
         width: 100%;
         height: 100%;
         display: flex;
         align-items: center;
         justify-content: center;
         padding: 20px;
         box-sizing: border-box;
     }

     .box {
         width: 400px;
         max-width: 90%;
         background: #fff;
         border-radius: 8px;
         box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
         padding: 30px;
         box-sizing: border-box;
     }

     h1 {
         color: #ff6633;
         text-align: center;
         margin-bottom: 20px;
     }

     .form-group {
         margin-bottom: 20px;
     }

     .form-group label {
         display: block;
         margin-bottom: 5px;
         font-size: 16px;
     }

     .form-group input {
         width: 100%;
         padding: 10px;
         border: 1px solid #ccc;
         border-radius: 4px;
         box-sizing: border-box;
     }

     .pay-methods {
         display: flex;
         gap: 10px;
         margin-bottom: 20px;
     }

     .pay-methods button {
         padding: 10px 20px;
         border: none;
         border-radius: 4px;
         background: #ff6633;
         color: #fff;
         cursor: pointer;
         font-size: 16px;
     }

     .pay-btn {
         width: 100%;
         padding: 10px;
         background: #ff6633;
         color: #fff;
         border: none;
         border-radius: 4px;
         font-size: 16px;
         cursor: pointer;
     }